4.7 Article

Huanglongbing and Citrus Variegated Chlorosis Integrated Management Based on Favorable Periods for Vector Population Increase and Symptom Expression

Journal

PLANT DISEASE
Volume 105, Issue 10, Pages 3037-3047

Publisher

AMER PHYTOPATHOLOGICAL SOC
DOI: 10.1094/PDIS-06-20-1359-RE

Keywords

Citrus sinensis; vector-borne bacterial diseases; greening; CVC; epidemiology; spray timing; roguing

Categories

Funding

  1. Fundo de Defesa da Citricultura
  2. Fundacao de Amparoa Pesquisa do Estado de Sao Paulo [2007/55013-9]
  3. Conselho Nacional de Desenvolvimento Cienti fico e Tecnologico [303675/2009-8]

Ask authors/readers for more resources

This study compared the management of Huanglongbing and citrus variegated chlorosis during different time periods, showing that vector control and inoculum removal at different seasons did not significantly impact the progression of the diseases.
Huanglongbing (HLB, associated with Candidatus Liberibacter asiaticus and transmitted by the Asian citrus psyllid Diaphorina citri) and citrus variegated chlorosis (CVC, caused by Xylella fastidiosa subsp. pauca and transmitted by sharpshooter species) have been managed by vector control and removal of symptomatic trees. Although vectors and new symptomatic trees can be detected year round, peaks of vector populations are higher in spring and summer, and the most symptomatic trees are found in autumn and winter. This work aimed to compare the management of both diseases during these favorable periods. The experiment was conducted during 5 years in a commercial orchard and had a three-by-two factorial design. The factor vector control had three levels: monthly vector control year round (VCYR), monthly vector control in spring and summer (VCSS), and vector control when a threshold level of 10% occupancy was detected (VCOT). The factor inoculum removal had two levels: monthly eradication year round (TEYR) and monthly eradication in autumn and winter (TEAW). Host flush, both HLB and CVC vector populations, and the number of symptomatic citrus plants were visually assessed. The level of vectors over the seasons, as measured using the average area under the curve (AUC), was similar for all treatments with the exception of psyllid abundance, which was approximately 4.5 times higher for VCSS than for other treatments. For both diseases, no difference in the average AUC of disease progress and disease final incidence was observed. VCOT or adjusted VCSS associated with TEAW could be integrated for sustainable citrus production.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available